...Showers and thunderstorms across the plains into the Mississippivalley...

...Below average temperatures across the West...

A pair of deep upper lows will provide below average temperatures for both the western and eastern thirds of the contiguous United States while generating unsettled weather over the northwestern and northeastern corners.

Across the eastern U.S., a deep upper trough moving across the Ohio valley this morning is expected to continue amplifying today as itmoves into the East, with a closed low developing and moving slowlynortheastward along the Northeast coast on Saturday. The expected result is a prolonged precipitation event stretching into the holiday weekend across the parts of the Northeast, with much below average temperatures.

As the upper low amplifies overhead on Saturday, snow mixing with rain is possible across the higher elevations of the Adirondacks and mountains of northern New England.

Across the West, below average temperatures are expected as well as a closed low/deep upper trough moves overhead. Showers will continue across the Northwest into the northern Rockies, with some higher elevation snows today.

Heading into the weekend, temperatures will begin to moderate, with drying conditions as the upper low lifts into western Canada. However, an upper disturbance dropping around the backside of the low will bring a chance for more showers back into western Oregon by Saturday evening.

Over the central U.S., returning moisture/warm air will encouragescattered showers and thunderstorms both days across the plains. Upper disturbances interacting with this moisture may produce organized storms, generating locally heavy rains, across parts of Texas and the central plains into the mid Mississippi valley.

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